Game companies in Japan
694 companies
| Company | Founded | Games developed | Games published |
|---|---|---|---|
| J.P ROOM Inc | August 29, 2001 | 1 | — |
| Jaleco | July 3, 2006 | 12 | 29 |
| Japan Art Media | November 9, 1989 | 3 | — |
| Japan Media Programming Inc. | — | 1 | — |
| Japan Studio | November 16, 1993 | 17 | 3 |
| Jellyfish | — | 1 | 1 |
| Jupiter | June 11, 1992 | 34 | 24 |
| JVC | September 13, 1927 | 1 | 4 |
| K. Amusement Leasing Co. | 1972 | 1 | 1 |
| Kadokawa Corporation | 2014 | — | — |
| Kadokawa Games | April 2009 | 2 | 11 |
| Kadokawa Key-Process | 1954 | 5 | 2 |
| Kadokawa Shoten | November 10, 1945 | 3 | 16 |
| Kaga Create | June 22, 1988 | 2 | 5 |
| Kairosoft | September 2007 | 18 | 18 |
| Kaneko | June 25, 1980 | 1 | 2 |
| KAZe | 1987 | 1 | — |
| KCET | — | 1 | — |
| Kemco | 1984 | 11 | 59 |
| Key | July 21, 1998 | 15 | — |
| Kinotrope | December 1993 | 1 | — |
| KITERETSU | — | 1 | 1 |
| KLab | August 2000 | 4 | — |
| Kodansha | November 1909 | 1 | 2 |
| Koei | July 25, 1978 | 49 | 54 |
| Koei Tecmo Games | 2011 | 32 | 65 |
| Koei Tecmo Holdings | 2009 | 33 | 37 |
| Kogado Studio | 1916 | 8 | 7 |
| Konami | March 21, 1969 | 349 | 424 |
| Konami Computer Entertainment Japan | April 1996 | 3 | — |
| Konami Computer Entertainment Osaka | April 1995 | 2 | — |
| Konami Digital Entertainment | March 31, 2006 | 14 | 21 |
| Kotobuki System | 1984 | 1 | — |
| Kuusoukagaku | July 29, 1991 | 2 | — |
| Kyugo Trading | — | — | 1 |
| Land Ho! | 1999 | 5 | — |
| Landkarte | — | 1 | 1 |
| Lapis lazuli | — | 1 | — |
| Lasengle | December 28, 2021 | 1 | 1 |
| Leaf | 1995 | 8 | 4 |
| Lenar | April 28, 1977 | 1 | — |
| Level-5 | October 28, 1998 | 50 | 28 |
| Liar-soft | — | 6 | 4 |
| Light | June 1999 | 8 | 8 |
| LiLiM | — | 1 | 1 |
| Liquid | — | 1 | 1 |
| Littlewitch | — | 3 | 3 |
| Live Wire | February 2018 | 3 | — |
| Lose | — | 3 | — |
| Lump of Sugar | 2005 | 3 | 1 |
| M2 | August 8, 1991 | 15 | 4 |
| Madosoft | — | 1 | — |
| Mages | July 7, 2006 | 12 | 11 |
| Magical Company | May 29, 1985 | 3 | 1 |
| Makura | 2005 | 2 | 1 |
| MangaGamer | 2008 | — | 39 |
| Marmalade | — | 1 | 1 |
| Marubeni | 1949 | — | 1 |
| Marvelous | 2003 | 17 | 37 |
| Marvelous Entertainment | June 25, 1997 | 12 | 26 |
| Masaya | 1985 | 4 | 8 |
| Masterpiece | February 15, 1992 | 1 | — |
| Matrix Software | July 1994 | 12 | — |
| Matsushita Electric Industrial Co., Ltd. | 1935 | — | 1 |
| Mebius. | — | — | 1 |
| Media Factory | December 1986 | 1 | 4 |
| Media Rings | October 2, 1989 | 3 | 2 |
| Media Station | 1981 | 1 | — |
| Media.Vision | March 1993 | 11 | — |
| MediaKite | April 1991 | — | 1 |
| MediaWorks | 1992 | 1 | 2 |
| MediBang | January 27, 2014 | — | 1 |
| MegaHouse | March 2, 1962 | — | 1 |
| Meldac | 1990 | — | 1 |
| Metro Corporation | May 15, 1987 | 1 | 1 |
| Microcabin | November 27, 1982 | 11 | 8 |
| Micronet | October 29, 1982 | — | 1 |
| Microsoft Japan | 1986 | — | 1 |
| MiCROViSion Inc. | December 1986 | 1 | — |
| Milestone | 2003 | 5 | 4 |
| Millennium Kitchen | December 1997 | 6 | — |
| Minato Soft | 2006 | 2 | — |
| Minori | April 2007 | 6 | 3 |
| Mitchell Corporation | February 1960 | 3 | — |
| Mobile21 | 1999 | 2 | — |
| Moe App | 2011 | — | 7 |
| Monkey Craft | — | 6 | — |
| Monolith Soft Inc. | October 1999 | 18 | — |
| Monstars | October 20, 2011 | 2 | — |
| Moonstone | 2003 | 6 | 4 |
| MOSS | 1993 | 8 | 3 |
| Movic | 1983 | — | 1 |
| MTO | May 28, 1996 | 5 | 1 |
| MyDearest | April 2016 | 1 | 1 |
| Mynet | June 14, 2006 | 1 | 1 |
| Namco | June 1955 | 127 | 166 |
| Namco Tales Studio | 1986 | 18 | — |
| NanaOn-Sha | 1993 | 7 | — |
| NanaWind | — | 2 | 2 |
| Navel | 2003 | 8 | 3 |